Threshold Wind Speed Determination in Intermittent Wind-Sand Flow
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Solution Overview
Problem
Current methods for determining threshold wind speed in intermittent wind-sand flow are subjective and prone to measurement errors due to the instability of wind-sand flow and hysteresis in wind speed response, lacking objective equipment for accurate monitoring.
Innovation Solution
A device equipped with a rotary bearing, telescopic rod, wind-driven vane, photoelectric induction probes, and one-dimensional hot-wire anemometers that can move with the wind direction, allowing real-time observation and analysis of sand flux and wind speed to determine the threshold wind speed through probability distribution curves.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If artificial subjective determination of sand movement is used to measure threshold wind speed, then the measurement process is simple, but the measurement precision is low due to wind-sand flow instability and hysteresis
Solution Approach 1:
The patent replaces artificial visual observation with automated photoelectric detection systems. Photoelectric induction probes detect sand particle movement by measuring light scattering, while hot-wire anemometers measure wind speed through thermal dissipation. This substitution eliminates subjective human judgment and achieves automated, precise, and objective threshold wind speed determination.
Solution Approach 2:
The patent introduces photoelectric induction probes as intermediaries between the wind-sand flow and the measurement system. These probes detect sand particle presence and movement by measuring changes in light transmission, converting physical sand flow into detectable electrical signals that can be analyzed to determine threshold wind speed objectively.
2Reliability
If traditional average wind speed measurement is used in a certain time period, then the measurement method is simple, but the reliability is low due to hysteresis in wind speed response
Solution Approach 1:
The patent implements continuous real-time monitoring of both wind speed and sand flux using hot-wire anemometers and photoelectric induction probes. This continuous measurement approach captures the dynamic relationship between wind speed and sand movement, eliminating the time delays and hysteresis effects inherent in periodic or averaged measurements, thereby improving reliability.
Solution Approach 2:
The patent establishes a feedback mechanism by simultaneously measuring wind speed and sand flux and analyzing their probabilistic relationship. The system continuously compares wind speed data with corresponding sand movement data to dynamically determine threshold values, creating a closed-loop measurement system that adapts to changing wind-sand flow conditions and eliminates response delays.
3Adaptability or versatility
If fixed monitoring equipment is used, then the device structure is simple, but the adaptability is low for moving with wind direction changes
Solution Approach 1:
The patent transforms the monitoring device from a static fixed structure to a dynamic system that can rotate and track wind direction changes. The device incorporates rotational mechanisms that allow the photoelectric probes and anemometers to reorient themselves according to the prevailing wind direction, maintaining optimal measurement positioning while adapting to changing environmental conditions.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
The device enhances monitoring efficiency and accuracy, reducing labor costs and enabling long-term, fixed-point observations, providing valuable data for desert region sand control engineering designs.
Implementation Method 1
Photoelectric induction probes 8 are installed on the earth surface wind-sand monitoring frame 7
Implementation Method 2
wind speed at different heights are observed in real time by using one-dimensional hot-wire anemometers
Implementation Method 3
A wind driven vane 6 is installed through the telescopic rod 5
Data Source
AI summary
The present disclosure relates to the field of environment monitoring equipment, and in particular, to a device for determining threshold wind speed in intermittent wind-sand flow. The device includes a base. A rotary bearing is installed on the base. A circuitry is installed in the base. A telescopic rod is installed through the rotary bearing. A wind driven vane and an earth surface wind-sand monitoring frame are installed on the telescopic rod. Photoelectric induction probes are installed on the earth surface wind-sand monitoring frame.